part 1: write one page about a place where trigonometric iddentitiesare used in real life. include the identity where it is and where it' found.

part 2: derive ane xpression for the difference quotient when the function is sin(x) and when it's cos(x). show all steps in derivation

part 3: find a real world situation where sum-to product identity is used for something other than solving calculus problems

would love any help on any part of this...gimme a link or maybe the answer in part 2's case.......thanks